题目内容：

the boy is piaying backetball否定句一般疑问句,肯定回答和否定回答.还有划线提问划在play...backet

优质解答

1.否定句：The boy isn't playing basketball.
2.一般疑问句：Is the boy playing basketball?
3.肯定回答：Yes,he is.
4.否定回答：No,he isn't.
5.下划线提问：What is the boy doing?